Befriend

Ledballoon appears in the Springdale Underground Waterway. The easiest way to reach the area they are located if you've never been to the Springdale Underground Waterway before is to enter through the drainage pipe located on the western side of Uptown Springdale just near the canal. (You have to own a Rank C watch and unlock a Rank C Watch Lock in the waterway to reach the Yo-Kai. There are usually Ledballoons here, and more often than not one Chummer will join the battle when you run into a Ledballoon, though occasionally Chummers will spawn in the overworld instead of Ledballoons, in which case the battle will usually consist of two Chummers and one Ledballoon.)